To enable the Fn + Home key function, kindly upgrade the firmware using the steps below.
1. Disable all antivirus programs that may interfere with the upgrade software.
2. Extract all files from the archive.
3. Connect the keyboard to the PC.
4. Double-click FB574.exe.
5. Press the Upgrade Button.
6. Once upgrade is successful, exit the application.
This upgrade enable the function of Fn + Home button which can be used to change LED effects.